Hammer head



FIG. 1 is a frontal perspective view of a hammer head showing the new design;

FIG. 2 is a side profile view of the hammer head of FIG. 1;

FIG. 3 is a frontal view of the hammer head of FIG. 1;

FIG. 4 is a bottom view of the hammer head of FIG. 1; and,

FIG. 5 is a rear perspective view of the hammer head of FIG. 1.

The broken line portions of the disclosure are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a hammer head, as shown and described. 